As far as I know, they did have backup diesel generators to run the cooling systems, but those generators were disabled by all the water from the Tsunami waves. This was like a worst-case earthquake and Tsunami scenario that they didn’t fully plan for. This is what can happen when government/corporate bureaucracies get rolling with their own momentum and want to get things done too fast and with inadequate investment.
Right but they were not high enough ot strong enough to withstand a predictable event. GE screwed up.